Strip via wasm-opt

codecs/build-wasi-sdk.sh

@@ -0,0 +1,3 @@
+#!/bin/sh -e
+docker build -t squoosh-wasi-sdk - < ../wasi-sdk.Dockerfile
+docker run -it --rm -v $PWD:/src squoosh-wasi-sdk "$@"

codecs/mozjpeg/Makefile

@@ -1,47 +1,51 @@
 CODEC_URL := https://github.com/mozilla/mozjpeg/archive/v3.3.1.tar.gz
 CODEC_DIR := node_modules/mozjpeg
+CODEC_BUILD_DIR := $(CODEC_DIR)/build
 CODEC_OUT_RELATIVE := .libs/libjpeg.a rdswitch.o
-CODEC_OUT := $(addprefix $(CODEC_DIR)/, $(CODEC_OUT_RELATIVE))
-ENVIRONMENT = worker
+CODEC_OUT := $(addprefix $(CODEC_BUILD_DIR)/, $(CODEC_OUT_RELATIVE))
 
-OUT_JS := enc/mozjpeg_enc.js enc/mozjpeg_node_enc.js dec/mozjpeg_node_dec.js
-OUT_WASM := $(OUT_JS:.js=.wasm)
+OUT_WASM := enc/mozjpeg_enc.wasm
+
+OPTIMIZE := 3
+
+override CC = $(WASI_SDK_PREFIX)/bin/clang
+override CXX = $(WASI_SDK_PREFIX)/bin/clang++
+override CXXFLAGS += --sysroot=$(WASI_SDK_PREFIX)/share/wasi-sysroot -O$(OPTIMIZE) 
+override CFLAGS += --sysroot=$(WASI_SDK_PREFIX)/share/wasi-sysroot -O$(OPTIMIZE)
+override RANLIB = $(WASI_SDK_PREFIX)/bin/ranlib
+
+# Without this export, configure doesn’t seem to see $CC and $CFLAGS
+export
 
 .PHONY: all clean
 
-all: $(OUT_JS)
+all: $(OUT_WASM)
 
-# Define dependencies for all variations of build artifacts.
-$(filter enc/%,$(OUT_JS)): enc/mozjpeg_enc.cpp
-$(filter dec/%,$(OUT_JS)): dec/mozjpeg_dec.cpp
-
-enc/mozjpeg_node_enc.js dec/mozjpeg_node_dec.js: ENVIRONMENT = node
-
-%.js: $(CODEC_OUT)
+$(OUT_WASM): $(CODEC_OUT)
 	$(CXX) \
+		-I $(CODEC_BUILD_DIR) \
 		-I $(CODEC_DIR) \
 		${CXXFLAGS} \
 		${LDFLAGS} \
-		--closure 1 \
-		--bind \
-		-s ALLOW_MEMORY_GROWTH=1 \
-		-s MODULARIZE=1 \
-		-s TEXTDECODER=2 \
-		-s ENVIRONMENT=$(ENVIRONMENT) \
-		-s EXPORT_ES6=1 \
 		-o $@ \
-		$+
+		enc/mozjpeg_enc.cpp \
+		$(CODEC_OUT)
+	$(BINARYEN_PREFIX)/bin/wasm-opt --strip-debug --strip-dwarf --strip-producers --strip-target-features -O4 -o $(OUT_WASM) $(OUT_WASM)
 
 # This one is a bit special: there is no rule for .libs/libjpeg.a
 #  so we use libjpeg.la which implicitly builds that one instead.
-$(CODEC_DIR)/.libs/libjpeg.a: $(CODEC_DIR)/Makefile
-	$(MAKE) -C $(CODEC_DIR) libjpeg.la
+$(CODEC_BUILD_DIR)/.libs/libjpeg.a: $(CODEC_BUILD_DIR)/Makefile
+	$(MAKE) -C $(CODEC_BUILD_DIR) libjpeg.la
 
-$(CODEC_DIR)/rdswitch.o: $(CODEC_DIR)/Makefile
-	$(MAKE) -C $(CODEC_DIR) rdswitch.o
+$(CODEC_BUILD_DIR)/rdswitch.o: $(CODEC_BUILD_DIR)/Makefile
+	$(MAKE) -C $(CODEC_BUILD_DIR) rdswitch.o
 
-$(CODEC_DIR)/Makefile: $(CODEC_DIR)/configure
-	cd $(CODEC_DIR) && ./configure \
+$(CODEC_BUILD_DIR)/Makefile: $(CODEC_DIR)/configure
+	mkdir -p $(CODEC_BUILD_DIR) && \
+	cd $(CODEC_BUILD_DIR) && \
+	../configure \
+		--target=wasm32-wasi \
+		--host=wasm32-wasi \
 		--disable-shared \
 		--without-turbojpeg \
 		--without-simd \
@@ -59,7 +63,10 @@ $(CODEC_DIR)/configure.ac: $(CODEC_DIR)
 $(CODEC_DIR):
 	mkdir -p $@
 	curl -sL $(CODEC_URL) | tar xz --strip 1 -C $@
+	cp $(WASI_SDK_PREFIX)/share/misc/config.* $(CODEC_DIR)
+	# ^ Monkey-path autoconf files as Ubuntu’s autoconf tools are too old
+  # to recognize WASI
 
 clean:
-	$(RM) $(OUT_JS) $(OUT_WASM)
-	$(MAKE) -C $(CODEC_DIR) clean
+	$(RM) $(OUT_WASM)
+	$(RM) -r $(CODEC_BUILD_DIR)

codecs/mozjpeg/enc/mozjpeg_enc.cpp

@@ -1,10 +1,6 @@
-#include <emscripten/bind.h>
-#include <emscripten/val.h>
-#include <inttypes.h>
-#include <setjmp.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
+#include <stdint.h>
+#include <string>
+
 #include "config.h"
 #include "jpeglib.h"
 
@@ -12,14 +8,6 @@ extern "C" {
 #include "cdjpeg.h"
 }
 
-using namespace emscripten;
-
-// MozJPEG doesn’t expose a numeric version, so I have to do some fun C macro
-// hackery to turn it into a string. More details here:
-// https://gcc.gnu.org/onlinedocs/cpp/Stringizing.html
-#define xstr(s) str(s)
-#define str(s) #s
-
 struct MozJpegOptions {
   int quality;
   bool baseline;
@@ -39,26 +27,17 @@ struct MozJpegOptions {
   int chroma_quality;
 };
 
-int version() {
-  char buffer[] = xstr(MOZJPEG_VERSION);
-  int version = 0;
-  int last_index = 0;
-  for (int i = 0; i < strlen(buffer); i++) {
-    if (buffer[i] == '.') {
-      buffer[i] = '\0';
-      version = version << 8 | atoi(&buffer[last_index]);
-      buffer[i] = '.';
-      last_index = i + 1;
-    }
-  }
-  version = version << 8 | atoi(&buffer[last_index]);
-  return version;
-}
+thread_local struct MozJpegOptions opts = {};
 
-thread_local const val Uint8Array = val::global("Uint8Array");
+struct DynArray {
+  size_t size;
+  uint8_t* ptr;
+};
 
-val encode(std::string image_in, int image_width, int image_height, MozJpegOptions opts) {
-  uint8_t* image_buffer = (uint8_t*)image_in.c_str();
+__attribute__((export_name("encode"))) intptr_t* encode(uintptr_t* image_in,
+                                                        int image_width,
+                                                        int image_height) {
+  uint8_t* image_buffer = reinterpret_cast<uint8_t*>(image_in);
 
   // The code below is basically the `write_JPEG_file` function from
   // https://github.com/mozilla/mozjpeg/blob/master/example.c
@@ -199,35 +178,47 @@ val encode(std::string image_in, int image_width, int image_height, MozJpegOptio
 
   /* Step 7: release JPEG compression object */
 
-  auto js_result = Uint8Array.new_(typed_memory_view(size, output));
-
   /* This is an important step since it will release a good deal of memory. */
   jpeg_destroy_compress(&cinfo);
-  free(output);
 
   /* And we're done! */
-  return js_result;
+  auto result = new DynArray();
+  result->size = size;
+  result->ptr = output;
+  return reinterpret_cast<intptr_t*>(result);
 }
 
-EMSCRIPTEN_BINDINGS(my_module) {
-  value_object<MozJpegOptions>("MozJpegOptions")
-      .field("quality", &MozJpegOptions::quality)
-      .field("baseline", &MozJpegOptions::baseline)
-      .field("arithmetic", &MozJpegOptions::arithmetic)
-      .field("progressive", &MozJpegOptions::progressive)
-      .field("optimize_coding", &MozJpegOptions::optimize_coding)
-      .field("smoothing", &MozJpegOptions::smoothing)
-      .field("color_space", &MozJpegOptions::color_space)
-      .field("quant_table", &MozJpegOptions::quant_table)
-      .field("trellis_multipass", &MozJpegOptions::trellis_multipass)
-      .field("trellis_opt_zero", &MozJpegOptions::trellis_opt_zero)
-      .field("trellis_opt_table", &MozJpegOptions::trellis_opt_table)
-      .field("trellis_loops", &MozJpegOptions::trellis_loops)
-      .field("chroma_subsample", &MozJpegOptions::chroma_subsample)
-      .field("auto_subsample", &MozJpegOptions::auto_subsample)
-      .field("separate_chroma_quality", &MozJpegOptions::separate_chroma_quality)
-      .field("chroma_quality", &MozJpegOptions::chroma_quality);
-
-  function("version", &version);
-  function("encode", &encode);
+__attribute__((export_name("alloc"))) uintptr_t* alloc(size_t size) {
+  return reinterpret_cast<uintptr_t*>(malloc(size));
 }
+
+__attribute__((export_name("dealloc"))) void dealloc(uintptr_t* ptr) {
+  return free(ptr);
+}
+
+#define MAKE_SETTER(type, name)                                                    \
+  __attribute__((export_name("set_opts_" #name))) void set_opts_##name(type val) { \
+    opts.name = val;                                                               \
+  }
+
+MAKE_SETTER(int, quality);
+MAKE_SETTER(bool, baseline);
+MAKE_SETTER(bool, arithmetic);
+MAKE_SETTER(bool, progressive);
+MAKE_SETTER(bool, optimize_coding);
+MAKE_SETTER(int, smoothing);
+MAKE_SETTER(int, color_space);
+MAKE_SETTER(int, quant_table);
+MAKE_SETTER(bool, trellis_multipass);
+MAKE_SETTER(bool, trellis_opt_zero);
+MAKE_SETTER(bool, trellis_opt_table);
+MAKE_SETTER(int, trellis_loops);
+MAKE_SETTER(bool, auto_subsample);
+MAKE_SETTER(int, chroma_subsample);
+MAKE_SETTER(bool, separate_chroma_quality);
+MAKE_SETTER(int, chroma_quality);
+
+// To satisfy WASI SDK compiler and make sure that init code runs.
+int main() {
+  return 0;
+}

codecs/mozjpeg/enc/mozjpeg_enc.d.ts

@@ -23,15 +23,29 @@ export interface EncodeOptions {
   chroma_quality: number;
 }
 
-export interface MozJPEGModule extends EmscriptenWasm.Module {
+export interface MozJPEGModuleExports {
+  memory: WebAssembly.Memory;
+  alloc(size: number): number;
+  dealloc(ptr: number): void;
   encode(
-    data: BufferSource,
+    data: number,
     width: number,
-    height: number,
-    options: EncodeOptions,
-  ): Uint8Array;
-}
-
-declare var moduleFactory: EmscriptenWasm.ModuleFactory<MozJPEGModule>;
-
-export default moduleFactory;
+    height: number
+  ): number;
+  set_opts_quality( quality: number): void;
+  set_opts_baseline( baseline: boolean): void;
+  set_opts_arithmetic( arithmetic: boolean): void;
+  set_opts_progressive( progressive: boolean): void;
+  set_opts_optimize_coding( optimize_coding: boolean): void;
+  set_opts_smoothing( smoothing: number): void;
+  set_opts_color_space( color_space: number): void;
+  set_opts_quant_table( quant_table: number): void;
+  set_opts_trellis_multipass( trellis_multipass: boolean): void;
+  set_opts_trellis_opt_zero( trellis_opt_zero: boolean): void;
+  set_opts_trellis_opt_table( trellis_opt_table: boolean): void;
+  set_opts_trellis_loops( trellis_loops: number): void;
+  set_opts_auto_subsample( auto_subsample: boolean): void;
+  set_opts_chroma_subsample( chroma_subsample: number): void;
+  set_opts_separate_chroma_quality( separate_chroma_quality: boolean): void;
+  set_opts_chroma_quality( chroma_quality: number): void;
+}

codecs/mozjpeg/enc/mozjpeg_enc.js

@@ -1,60 +0,0 @@
-
-var Module = (function() {
-  var _scriptDir = import.meta.url;
-  
-  return (
-function(Module) {
-  Module = Module || {};
-
-
-var f;f||(f=typeof Module !== 'undefined' ? Module : {});var aa,ba;f.ready=new Promise(function(a,b){aa=a;ba=b});var r={},t;for(t in f)f.hasOwnProperty(t)&&(r[t]=f[t]);var ca="./this.program";function ea(a,b){throw b;}var u="",fa;u=self.location.href;_scriptDir&&(u=_scriptDir);0!==u.indexOf("blob:")?u=u.substr(0,u.lastIndexOf("/")+1):u="";fa=function(a){var b=new XMLHttpRequest;b.open("GET",a,!1);b.responseType="arraybuffer";b.send(null);return new Uint8Array(b.response)};
-var ha=f.print||console.log.bind(console),v=f.printErr||console.warn.bind(console);for(t in r)r.hasOwnProperty(t)&&(f[t]=r[t]);r=null;f.thisProgram&&(ca=f.thisProgram);f.quit&&(ea=f.quit);var w;f.wasmBinary&&(w=f.wasmBinary);var noExitRuntime;f.noExitRuntime&&(noExitRuntime=f.noExitRuntime);"object"!==typeof WebAssembly&&A("no native wasm support detected");var B,ia=!1,ja=new TextDecoder("utf8");
-function ka(a,b,c){var d=C;if(0<c){c=b+c-1;for(var e=0;e<a.length;++e){var g=a.charCodeAt(e);if(55296<=g&&57343>=g){var m=a.charCodeAt(++e);g=65536+((g&1023)<<10)|m&1023}if(127>=g){if(b>=c)break;d[b++]=g}else{if(2047>=g){if(b+1>=c)break;d[b++]=192|g>>6}else{if(65535>=g){if(b+2>=c)break;d[b++]=224|g>>12}else{if(b+3>=c)break;d[b++]=240|g>>18;d[b++]=128|g>>12&63}d[b++]=128|g>>6&63}d[b++]=128|g&63}}d[b]=0}}var la=new TextDecoder("utf-16le");
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-function Aa(){var a=f.preRun.shift();wa.unshift(a)}var L=0,Ba=null,M=null;f.preloadedImages={};f.preloadedAudios={};function A(a){if(f.onAbort)f.onAbort(a);v(a);ia=!0;a=new WebAssembly.RuntimeError("abort("+a+"). Build with -s ASSERTIONS=1 for more info.");ba(a);throw a;}function Ca(){var a=N;return String.prototype.startsWith?a.startsWith("data:application/octet-stream;base64,"):0===a.indexOf("data:application/octet-stream;base64,")}var N="mozjpeg_enc.wasm";
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-export default Module;

codecs/mozjpeg/enc/mozjpeg_node_enc.js

@@ -1,61 +0,0 @@
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-(function(){function a(e){f.asm=e.exports;J=f.asm.C;K--;f.monitorRunDependencies&&f.monitorRunDependencies(K);0==K&&(null!==Ga&&(clearInterval(Ga),Ga=null),L&&(e=L,L=null,e()))}function b(e){a(e.instance)}function c(e){return Promise.resolve().then(Ja).then(function(g){return WebAssembly.instantiate(g,d)}).then(e,function(g){v("failed to asynchronously prepare wasm: "+g);u(g)})}var d={a:tb};K++;f.monitorRunDependencies&&f.monitorRunDependencies(K);if(f.instantiateWasm)try{return f.instantiateWasm(d,
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-f.dynCall_jiji=function(){return(f.dynCall_jiji=f.asm.I).apply(null,arguments)};var ub;function la(a){this.name="ExitStatus";this.message="Program terminated with exit("+a+")";this.status=a}L=function vb(){ub||wb();ub||(L=vb)};
-function wb(){function a(){if(!ub&&(ub=!0,f.calledRun=!0,!na)){N(Ca);N(Da);aa(f);if(f.onRuntimeInitialized)f.onRuntimeInitialized();if(f.postRun)for("function"==typeof f.postRun&&(f.postRun=[f.postRun]);f.postRun.length;){var b=f.postRun.shift();Ea.unshift(b)}N(Ea)}}if(!(0<K)){if(f.preRun)for("function"==typeof f.preRun&&(f.preRun=[f.preRun]);f.preRun.length;)Fa();N(Ba);0<K||(f.setStatus?(f.setStatus("Running..."),setTimeout(function(){setTimeout(function(){f.setStatus("")},1);a()},1)):a())}}
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-
-
-  return Module.ready
-}
-);
-})();
-export default Module;

codecs/mozjpeg/package.json

@@ -1,5 +1,5 @@
 {
   "scripts": {
-    "build": "../build-cpp.sh"
+    "build": "../build-wasi-sdk.sh"
   }
 }

codecs/wasi-sdk.Dockerfile

@@ -0,0 +1,15 @@
+FROM ubuntu:20.10
+RUN apt-get update && apt-get install -qqy autoconf libtool pkg-config curl build-essential
+ENV WASI_SDK_VERSION "12"
+ENV WASI_SDK_PREFIX "/opt/wasi-sdk"
+RUN mkdir -p ${WASI_SDK_PREFIX} && \
+  curl -L https://github.com/WebAssembly/wasi-sdk/releases/download/wasi-sdk-${WASI_SDK_VERSION}/wasi-sdk-${WASI_SDK_VERSION}.0-linux.tar.gz | tar -xz --strip 1 -C /opt/wasi-sdk
+ENV BINARYEN_PREFIX "/opt/binaryen"
+RUN mkdir -p ${BINARYEN_PREFIX} && \
+  curl -L https://github.com/WebAssembly/binaryen/releases/download/version_101/binaryen-version_101-x86_64-linux.tar.gz | tar -xz --strip 1 -C ${BINARYEN_PREFIX}
+# Maybe we need it later. Leaving it here for now.
+# ENV WABT_PREFIX "/opt/wabt"
+# RUN mkdir -p ${WABT_PREFIX} && \
+#   curl -L https://github.com/WebAssembly/wabt/releases/download/1.0.23/wabt-1.0.23-ubuntu.tar.gz | tar -xz --strip 1 -C ${WABT_PREFIX}
+WORKDIR /src
+CMD ["sh", "-c", "make -j`nproc`"]

src/features/encoders/mozJPEG/shared/meta.ts

@@ -13,8 +13,9 @@
 import {
   EncodeOptions,
   MozJpegColorSpace,
+  MozJPEGModuleExports,
 } from 'codecs/mozjpeg/enc/mozjpeg_enc';
-export { EncodeOptions, MozJpegColorSpace };
+export { EncodeOptions, MozJpegColorSpace, MozJPEGModuleExports };
 
 export const label = 'MozJPEG';
 export const mimeType = 'image/jpeg';

src/features/encoders/mozJPEG/worker/mozjpegEncode.ts

@@ -10,23 +10,44 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-import mozjpeg_enc, { MozJPEGModule } from 'codecs/mozjpeg/enc/mozjpeg_enc';
-import { EncodeOptions } from '../shared/meta';
+import { MozJPEGModuleExports, EncodeOptions } from '../shared/meta';
 import wasmUrl from 'url:codecs/mozjpeg/enc/mozjpeg_enc.wasm';
-import { initEmscriptenModule } from 'features/worker-utils';
+import { instantiateStreaming } from 'features/worker-utils';
+import {
+  makeEverythingElseThrow,
+  makeWasiEnv,
+} from 'features/worker-utils/wasi-utils';
 
-let emscriptenModule: Promise<MozJPEGModule>;
+const instancePromise: Promise<WebAssembly.Instance> = instantiateStreaming(
+  fetch(wasmUrl),
+  {
+    wasi_snapshot_preview1: makeEverythingElseThrow(makeWasiEnv()),
+  },
+).then(({ instance }) => instance);
 
 export default async function encode(
   data: ImageData,
   options: EncodeOptions,
 ): Promise<ArrayBuffer> {
-  if (!emscriptenModule) {
-    emscriptenModule = initEmscriptenModule(mozjpeg_enc, wasmUrl);
-  }
+  const instance = await instancePromise;
+  const exports: MozJPEGModuleExports = (instance.exports as unknown) as MozJPEGModuleExports;
 
-  const module = await emscriptenModule;
-  const resultView = module.encode(data.data, data.width, data.height, options);
+  for (const [opt, value] of Object.entries(options)) {
+    // @ts-ignore Can’t be bothered to make these typings works
+    exports[`set_opts_${opt}`](value);
+  }
+  const inPtr = exports.alloc(data.data.byteLength);
+  new Uint8ClampedArray(exports.memory.buffer, inPtr, data.data.length).set(
+    data.data,
+  );
+  const resultPtr = exports.encode(inPtr, data.width, data.height);
+  const dv = new DataView(exports.memory.buffer);
+  const length = dv.getUint32(resultPtr, true);
+  const outPtr = dv.getUint32(resultPtr + 4, true);
+  const result = new Uint8Array(exports.memory.buffer, outPtr, length).slice();
+  exports.dealloc(inPtr);
+  exports.dealloc(outPtr);
+  exports.dealloc(resultPtr);
   // wasm can’t run on SharedArrayBuffers, so we hard-cast to ArrayBuffer.
-  return resultView.buffer as ArrayBuffer;
+  return result.buffer;
 }

src/features/worker-utils/index.ts

@@ -29,3 +29,16 @@ export function initEmscriptenModule<T extends EmscriptenWasm.Module>(
 export function blobToArrayBuffer(blob: Blob): Promise<ArrayBuffer> {
   return new Response(blob).arrayBuffer();
 }
+
+export async function instantiateStreaming(
+  resp: Response | PromiseLike<Response>,
+  importObj?: WebAssembly.Imports,
+): Promise<WebAssembly.WebAssemblyInstantiatedSource> {
+  if (WebAssembly.instantiateStreaming) {
+    return WebAssembly.instantiateStreaming(resp, importObj);
+  }
+  return WebAssembly.instantiate(
+    await Promise.resolve(resp).then((r) => r.arrayBuffer()),
+    importObj,
+  );
+}

src/features/worker-utils/wasi-utils.ts

@@ -0,0 +1,32 @@
+/**
+ * Copyright 2021 Google Inc. All Rights Reserved.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+export function makeEverythingElseThrow(obj: { [x: string]: {} }): {} {
+  return new Proxy(obj, {
+    get(target, prop: string) {
+      if (prop in target) {
+        return target[prop];
+      }
+      return () => {
+        throw Error(`${prop} not implemented`);
+      };
+    },
+  });
+}
+
+export function makeWasiEnv() {
+  return {
+    environ_sizes_get: () => 0,
+    environ_get: () => 0,
+  };
+}